fix: Added gitlab docker image

Author: cliedeman

.gitlab-ci.yml

@@ -3,6 +3,7 @@ image: golang:1.14
 stages:
   - test
   - build
+  - image
 
 test:
   stage: test
@@ -11,6 +12,30 @@ test:
 
 build:
   stage: build
+  variables: 
+    CGO_ENABLED: 0
+  artifacts: 
+    - ./out
   script:
-    - go build ./cmd/semantic-release/
+    - go build -o out/semantic-release ./cmd/semantic-release/
     - ./semantic-release -dry || true
+
+image:
+  stage: image
+  tags:
+    - docker
+  cache: {}
+  image: docker:latest
+  variables:
+    DOCKER_DRIVER: overlay2
+    REGISTRY_IMAGE: registry.gitlab.com/go-semantic-release/semantic-release
+  services:
+    - docker:dind
+  dependencies: 
+    - build
+  only:
+    - tags 
+  script:
+    - docker login -u gitlab-ci-token -p $CI_BUILD_TOKEN $CI_REGISTRY
+    - docker build --tag $REGISTRY_IMAGE:$CI_COMMIT_TAG
+    - docker push $REGISTRY_IMAGE/web/server:$CI_COMMIT_TAG

Dockerfile

@@ -0,0 +1,8 @@
+# Obtain latest ca-certificates
+FROM alpine:latest as certs
+RUN apk --update add ca-certificates
+
+FROM scratch
+ADD out/semantic-release /usr/local/bin/release
+COPY --from=certs /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
+CMD ["release"]